mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-99Research ArticleСтатьиThe home-built pulse NMR spectrometer with CPMG sequence for 3He research at low temperaturesDolgorukovG. A.

Kremlevskaya 18, Kazan 420008

sasha_chayan@mail.ruKuzminV. V.

Kremlevskaya 18, Kazan 420008

BogaychukA. V.

Kremlevskaya 18, Kazan 420008; 420111 Kazan

AlakshinE. M.

Kremlevskaya 18, Kazan 420008; 420111 Kazan

SafiullinK. R.

Kremlevskaya 18, Kazan 420008; 420111 Kazan

KlochkovA. V.

Kremlevskaya 18, Kazan 420008

TagirovM. S.

Kremlevskaya 18, Kazan 420008; 420111 Kazan

Kazan Federal UniversityRussian FederationKazan Federal University; Institute of Applied Research, Tatarstan Academy of SciencesRussian Federation20182812201820218206 (9 pp.)Copyright © Dolgorukov G.A., Kuzmin V.V., Bogaychuk A.V., Alakshin E.M., Safiullin K.R., Klochkov A.V., Tagirov M.S., 20242024Dolgorukov G.A., Kuzmin V.V., Bogaychuk A.V., Alakshin E.M., Safiullin K.R., Klochkov A.V., Tagirov M.S.Dolgorukov G.A., Kuzmin V.V., Bogaychuk A.V., Alakshin E.M., Safiullin K.R., Klochkov A.V., Tagirov M.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/99

The home-built pulse NMR spectrometer for 3He investigations is described in this article. It operates in the 1.5-4.2 K temperature range, 0-850 mT magnetic field range, and 3-150 MHz frequency range with a dead time as short as 8 μs at 8 MHz that makes possible multinuclear NMR measurements. The spectrometer includes: saturation-recovery and inversion-recovery pulse sequences for spin-lattice relaxation time measurements by FID and Hahn echo amplitude measuring, CPMG pulse sequence for spin-spin relaxation time measurements, pulse gradient coils for diffusion measurements and a possibility to modify surface of porous samples by preadsorption of certain amount of nitrogen. The block diagrams of the spectrometer, the transmit-receive path and the amplifier are also presented.

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The authors declare that there are no conflicts of interest present.